Most played cards in Madness:

5 Decks
 ↓ Force of Will
16 copies – 3.2 avg
↓ Basking Rootwalla
16 copies – 3.2 avg
↓ Tropical Island
16 copies – 3.2 avg
↓ Squee, Goblin Nabob
16 copies – 3.2 avg
↓ Wild Mongrel
16 copies – 3.2 avg
↓ Bazaar of Baghdad
15 copies – 3 avg
↓ Circular Logic
12 copies – 2.4 avg
↓ Roar of the Wurm
12 copies – 2.4 avg
↓ Wooded Foothills
12 copies – 2.4 avg
↓ Pyrostatic Pillar
11 copies – 2.2 avg
↓ Naturalize
10 copies – 2 avg
↓ Careful Study
9 copies – 1.8 avg
↓ Arrogant Wurm
8 copies – 1.6 avg
↓ Volcanic Island
7 copies – 1.4 avg
↓ Wonder
6 copies – 1.2 avg
↓ Deep Analysis
6 copies – 1.2 avg
↓ Taiga
6 copies – 1.2 avg
↓ Red Elemental Blast
6 copies – 1.2 avg
↓ Null Rod
5 copies – 1 avg
↓ Waterfront Bouncer
5 copies – 1 avg